Glass-blowing machine.



G. O. CRAWFORD.

GLASS BLOWING MACHINE.

APPLICATION FILED MAR. e, 1912.

1,039,700, Patented Oct. 1, 1912'.

a SHEETS-SHEET 1. 2

JULIE-.1. 6

. awuwvtoa Ge 7 0r wi tmeooeo 0 (9e 0.

G-, 0. CRAWFORD.

GLASS BLOWING MACHINE.

APPLICATION FILED MAR. 6, 1912.

1,039,700. Patented 00t.1,1912.'

3 SHEETS-SHEET 2.

E E: xi-

George 6. 711 71f]?! vari,

e. o. CRAWFORD. GLASS BLOWING MACHINE.

APPLICATION FILED MAR. 6, 1912.

fl m h ll my; WW mm m m P 8v e i i R IIL RV m.fill l u m m 7 K 3 M .U 1 i w GEORGE O. CRAWFORD, F BARTLESVILLE, OKLAHOMA;

GLASS-BLOWING MACHINE.

- To all whom it may concern! Be it known that I, GEORGE G. CRAWFOR a citizen of the United States, residing at Bartlesville, in the county of Washington' accompanying drawings.

and State of. Oklahoma, have invented certain new and useful'linprovements in Glass- Blowing lslachines, of which the following is a specification, reference being had to the This invention comprehends certain new and useful improvements. in glass blowing machines and relates particularly to machines for use in blowingbottles, although it is to be understood that the invention is not limited to this use. v

The invention has for its primary object a simple, durable and efficient construction of apparatus of this character whichflm-ay be conveniently employed to partially blow up the .blank, after which theblanl: mold is opened and. the'blank with the neck mold attached transferred to the blow 'mold.

The invention also hasfo'r its object a simple and efficient apparatus of this character which will automatically form a partial vacuum underneath and incommunication with the bottom of the neck mold for forming a bottle, whereby the moltenglass poured therein and into the blank mold, will rapidly flow around a plungerQthe end of which projects into the mold and thereby form the neck of the bottle, the parts being -so arranged that subsequently to this operation, air may be easily admitted into the neck mold-after the plunger has been automatically withdrawn therefrom and the blank thus partially'blown' up.

A further object ofl'he invention is to provide an improved molding apparatus, the parts of which can he cheaply manufactured and readily assembled and which will not be liable to get out of order or require any unnecessary attention. And the invention also aims to generally improvethis class of devices and to render them more useful and commercially desirable; I

lVith these and'other objects in view, as

will more fully appear as the description proceeds, the invention consists in certainconstructions, arrangements and combinetions of the parts that-.I fully describe and claim.

For a full understanding of the invention, reference is to be had to the followir ig deshall hereinafter Specification of Letterslatent.

Application filed March 6, i912. Serial No.- 682,034;

- of the table or mold support. I I Corresponding and like parts are referred. t0 lI1 tl18 following description and desig- 'nated in the accompanying drawings by like PatentedOct. 1",1912.

scl iption and accompanying[drawings :in which,.'

Figure apparatus embodying the-improvements of 1 is aside elevation'ofa molding my invention. Fig.2-is alongitud-inal sec tional view on the-line,22, ofFig. 1. Fig.

8 is a detail perspective view of the plungertrip. Fig. l is a horizontal sectional view, the section being taken through the upper cylinders, and, Fig. 5 is a top plan view.

reference characters. 1n the present embodlm'ent of'my'invenf, tion, I-mount two of my nnproved molding devices in a frame-workl Which'is supported on the ground or traveling wheels,

as shown and which includes an upper bar 2 which is formed with bosses3 constituting of said tables being formed with dovetail recesses 4 into which the neck molds 5, may be easily inserted so as to be securely 'held in place while the molding operations are being performed.

6 designates a blank mold which is adapted to fit around the neck mold 5, it being understood that these molds'are of the .ordinary character composed of hingedly-connected sections having handles by which they are manipulated and carried from one place to another.

WVhileI have shown inthe accompany der"7' provided atits upper end with a head 8, a lower vertically disposed cylinder 9 in longitudinal alinement with the cylinder 7 and provided at itsloWer end with a head 10 and. the. interposed partition or head 11 whiclf is secured by bolts or-similar fastening-devieeschetlreenciheiontstandi flanges 12 that are formed on the adjoining'ends of said cylinders. Apiston 13 is mounted for reciprocation in the upper cylinder? and a corresponding piston 14 is mounted in the 75 I table s' -for the mold, and the upper surfaces v lower cylinder 9, said cylinders being oper" atively connected together so as to move simultaneously, through the instrumentality' of a tubular piston rod 15 which works through apacking box 16 carried by the intermediate head 11.

A plunger rod 7 is movable through the hollow piston rod 15, being guided in its movements by the packing box 13 of the piston 13 and a similar packing box (not shown) in the piston 14, the plunger rod passing through the pistons and being formed at its upper end with a plunger 18 which works in an opening 19 formed in the bed or table 3.

The lower end of the plunger 17 extends downwardly through a-packing bOK 2O carried by the lower head 10 of the cylinder 9 and is provided at its extremity with a cup 21 fixed thereon and designed to receive one end of a spring 22 coiled around the lower protruding end of the plunger rod, the upper end of the spring bearing against the packing box 20 and thereby tending to move the plunger rod in a downward. direction. To hold the plunger rod in its upper position against the tension of the spring 22, I provide an arm 23 which is adapted to extend.

underneath the cup 21 and engage the same. The arm 23 is secured at one end to the lower end of a vertically disposed shaft '24 which is mounted in the framework 1- to oscillate about its longitudinal axis, said shaft 24 being provided intermediate of its ends with a perpendicularly disposed lug 25 which is connected by a contractile spring 26 to aicorresponding lug formed on the corresponding shaft-of the other molding a paratus, whereby the shafts are turned automatically in a direction to carry their lower arms 23 underneath the lower extremities 1 I which. is eenneotedto tee of the plunger rods after the latter-have been. raised. The shaft 24 carries at its upper end'a perpendicularly projecting trip arm 27 which is, designed. to extend into an opening 28 formed in the side wall of the upper cylinder '7 near the lower end whereby as the upper piston 13 moves down wardly, it will engage the trip 2? and move the latter outwardly, ti

and lead,

trol e air 1 from t e pipes 29 and :30 he d by or threeair from a pipe 32 which recei:

:ly from the pipe 33 and three-way cool; 31,

te a i;

is, in a di recti on to carry the lower arm 23 out from ;oper end oris intended to flow also through a pipe 34 13, the admission of the air into the upper end of the cylinder 7 being controlled by a valve or cook From the toregoing description in connection with the accompanying drawings, the operation of my improved glass blowing apparatus will be apparent. Air is first ad .mitted by manipulating the three-way cook 31 in the pipe 29, from whence the air passes into the lower cylinder 9 below the lower piston 14, both pistons thereby moving upwardly and the air above the upper piston 13 passing out through the opening 19, for it is to be understood that the opening 19 is of suficient diameter to permit the air to pass out around the plunger 18. this operation, the plunger is held in its upper position with its upper end projecting into the neck mold 5 andspaced iroi'rr the neck forming opening of said mold. The glass is then poured into the blank mold 6 and the air pressure is shut oil from below the'piston 14 and admitted on top oitsa-id, piston by means of the pipe 30, it being thus evident that the pipes 29 and 30 each have a double function. That is to say, each is an inlet pipe and an outlet pipe, under certain conditions. Now when the air is exhausting During through the pipe 29 and being admitted" through the pipe 30 into the lower cylinder 9 on top'of the lower piston 14, the pistons 14 and 13 naturally moving downwardly. As the upper piston 13 moves down, the air beneath said piston is vented through the side opening 28 of the upper cylinder 7, while at the same time the air above piston 13 has become rarefied so to 1 oduce a partial vacuum above said piston, said vacuum acting upon the that is in the blank mold 6 and neck mold 5, whereby the is drawn firmly mount. the space between the plunger 18 and the neck forming opening of the neck mold. In the downward movement of the piston 13, [the same will engage the trip arm 27 and turn the shaft 24 against the tension of the spring 26 a distance suiiicient to carry the lower arm 23 out from underneath the lower extremity of the plunger rod 1?. the cup 21 w 'h is carried bythe lower protruding end the plunger rod 17, whereupon the sp ing be permitted to act the plunger 1'? will quickly mo e t e blank finished.

ice

Inord'er to set the plunger 18 in its upper'position, the stufling box 13 oft'the piston head 13 on the upward strokeof the latter strikes the shoulder formed at the lower end of the I plunger '18, thereby forcing the plunger neath the cup 21so as to hold the plunger iIi its upper position until-subsequently tripped. -Iti's to be noted that the inlet 34 of the cylinder 7 is so placed thatwhen; the plunger I8 is withdrawn from the blank, it is in .a positionto' receive a blast of air while the blank is being blown up. In this way, the

plipfier'm is cooled, as is necessary. -8t-.Iclaim'is:-- Xv 1. A glass blowing machine, including a cylinder, a mold table formed with an opening communicating with the cylinder and adapted to support a mold, apiston mounted in the cylinder, a plunger movable in the cylinder and adapted to project intothe mold, means for moving the piston in the cylinder away from the plunger so as to produce a partial vacuum around the plunger as specified, means .for withdrawing the Initting air into the mold.

2. A glass blowing machine, including a.

cylinder, a mold support having an openlng communicating with the cylinder, a

communicating with said cylinder and in which the plunger works a mold mounted on said support and huving an opening registering with the opening in the support,

spring 26 acts to turn the arm 23 u'nder-.

plunger, and means for subsequently ad mold adapted to rest on said support and a mold support provided with an opening the plunger being adapted for movement.

communicating with the interior of the cylinder, a mold adapted to'rest on' said support and having an opening communicating with the opening in the support, a plunger movable into and out of the openings in the mold support and mold, means for auto matically' moving the plunger into said' openings, means for creating a partial vacuum in the cylinder and around the plunger with the plunger held in sald openings,

.means for moving the plunger out of said openings, and means for admitting air into thecylinder after the plunger has been re tracted from said openings.

5. A glass blowing machine, including longitudinally alincd cylinders, pistons mounted in the respective cylinders. one of tively connected together for simultaneous IDOVQIDQHQQ plunger rod extending through said pistons and the cylinders and DIOJGCt-- ing out of one of the cylinders at one end, a plunger connected to the other end of the plunger rod, a mold support secured to one cylinder and having an opening communieating with said cylinder, the Plunger being movable in said opening, means for admitting air into said last named cylinder, means.

tending to hold the plunger and plunger rod with the plunger protruding from the upper end of the opening of the mold support, and means actuated by the piston of the last named cylinder for automatically releasing the holding means so as to permit a movement of the plunger.

6. A glass blowing machine, including upper and lower cylinders disposed in longitudinal alinement to each other, a mold support resting upon the upper cylinder and having an opening communicating with said cylinder, pistons mounted in the respective cylinders and connected together for simultaneous movement, a plunger rod movglgle through said pistons and cylinders and projecting out of the lower end of the loyver cylinderya plunger connectedto theptll'ier end of theplunger rod and mounted in the opening in the mold sup ort, the lower cyl-' inder being formed witi inletand'outlet openings for alr on opposite faces of its piston, the upper cylinder being also provided with an :air inlet opening above its piston and with an opening below its piston leading to the atmosphere, an arm projecting intot-lie last named opening and designed for engagement by the piston of the upper said cylinders being-for-n'icd with inlet and outlet openings on opposite snlcs of the piston thereot and the pistons being operato move the same downwardly upon the movement of the lower arm out from underneath said. rod.

7. A glass blowing machine, including a cylinder, a mold table formed with an opening communicating with the cylinder and adapted to" support a mold, a piston mounted in the cylinder, a plunger movable in the cylinder and adapted to project' into the mold, means for moving the piston in. the cylinder away from the plunger so as to produce a partial vacuum around the plunger, means for withdrawing theplunger,

means for subsequently admitting air into the mold, and means operable by the piston moving in the opposite direction for automa tically resetting the plunger.

8. A glass blowing machine, including upper and lower cylinders, a mold table formed with an opening communicating with the upper cylinder and adapted to snpport a mold, a piston mounted in the upper cylinder, a piston mounted in the lower cylinder, a tubular piston rod. connecting said pistons for simultaneous movement, a plunger movable in the upper cylinder and adapted to project into the mold, a plunger rod carrying the plunger and movable through the pistons and; the piston rod, means for holding the plunger rod with the plunger in the opening in the mold, means for admitting air into the lower cylinder for moving the pistons downwardly, Whereby the upper piston will create a. partial vacuum around the plunger, means for automatically releasing the plunger and permitting it to move downwardly by and upon the downward movement of the upper piston, means for subsequently admitting air into the upper. cylinder, and means for ad- I mitting air nito the lower cylinder below the lower piston.

In testimonywhereof I hereunto aiiix my signature in the presence of two witnesses. GEORGE C. CRAWFORD. Witnesses:

J OHN H. KANE, E. K, SHELLER.

Copies of this patent may beobtained for five cents each, by addressing the Comnfisslener of Patents, Washington, D. C. 

